Overview
What this challenge is about.
Fork an untested CLI, write characterization tests to find 4 bugs, fix 2, and earn a verifiable certificate.
The scenario
The company (around USD 4M ARR, charges enterprises for an audit-grade plan UI on top of the OSS CLI) lost its second customer this quarter to a release that broke rollback on PostgreSQL 16.
The Brief
What you'll do, and what you'll demonstrate.
Bring three critical modules of an untested OSS CLI from 8 percent to 75 percent meaningful test coverage and ship the work as reviewable PRs.
Earning criteria — what you'll demonstrate
- Distinguish characterization tests from specification tests in a legacy codebase
- Configure a CI coverage gate that does not become a rubber stamp
- Write a minimal failing test for a real bug before fixing it
- Trade off coverage targets against test maintenance cost
Program Fit
Where this fits in your program.
Sharpens the same skills your degree expects you to demonstrate.
Software Construction
Bachelor · Software Engineering
Strong alignment
This challenge maps to Software Construction at the Bachelor level. It sharpens the same practical skills your coursework expects — but in a real industry context with actual constraints and deliverables.
Skills
Skills you'll demonstrate.
Each one shows up on your verified credential.
- Unit Testing
Apply unit testing to solve real industry problems and demonstrate production-level capability.
- Integration Testing
Apply integration testing to solve real industry problems and demonstrate production-level capability.
- Test Coverage
Apply test coverage to solve real industry problems and demonstrate production-level capability.
- Characterization Testing
Apply characterization testing to solve real industry problems and demonstrate production-level capability.
- Ci Cd
Apply ci cd to solve real industry problems and demonstrate production-level capability.
- Code Review
Apply code review to solve real industry problems and demonstrate production-level capability.
Careers
Career paths this challenge builds toward
Completing this challenge demonstrates skills that transfer directly to these roles: